<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        body {
            min-height: 1000px;
            font-family: sans-serif;
        }

        div#container {
            height: 200px;
            width: 300px;
            overflow: scroll;
            /* border-radius: 5px; */
            /* margin: 10px; */
            border: 1px solid #AAAAAA;
        }

        div#content {
            height: 1000px;
            outline: none;
            /* padding: 10px; */
        }

        ::-webkit-scrollbar {
            width: 14px;
        }

        ::-webkit-scrollbar-thumb {
            border: 4px solid rgba(0, 0, 0, 0);
            background-clip: padding-box;
            border-radius: 9999px;
            background-color: #AAAAAA;
        }
    </style>
</head>

<body>
    <div id="container">
        <div id="content" contenteditable>
            Click to type...
        </div>
    </div>
</body>

</html>